Switch lock



I F. T. LEILICH SWITCH LOCK Filed May 11, 1920 2 sheeQs-sheet l Apr. 10, 1923. 1,451,366v

F. T. I EILICH SWITCH LOCK Filed May 11, 1920 2 sheets-sheet 2 Patented Apr. 10, 19.23.

UN TED Star-as ea mm osr cn,

' FRANK LEILICH, r atman; mamas; i

" l swrtrcn noon.

Application filed ma 11, 1920. Serial no. 380,456.

' I To all whom'z't mag/camera:f

Beit known that I, FRANKT. LnILIoH, a citizen ofthe United States, residing at Baltimore, in the'State of liia'ryland, have invented certain new and useful Improvements My invention relates to, switch locks."

f Among the objects of my'invention are i- {To provide a simple, cheap andefieetive switch 1001: which may be used to securely lock the movable portion of an electric- ,To provideaswitch so constructed and'" arranged" as-to be capable of locking the movable portion of a switch in any position in which it contacts with the cooperating portion.

To provide a switch lock which can be operated at a distance by the use of a suitable pole.

In carrying out my invention, I make use of the instrumentalities illustrated in the ac-' companying drawings, in which v Figure 1 'is a side view of a switch equipped with my improved lock.

Fig. 2 is an enlarged side view of my improved lock and the vcooperating portions ofthe switch. 1

Fig. 3 is a view of the parts shown in. Fig. 2looking in the direction of the arrow 3in said figure. v

Fig. 4 is a side view of a pole for usein connection with my improved switch lock. ,7

Fig; 5 is a view ofthe pole shown in Fig. 4 looking in the direction of the arrow 5 in said figure.

In the drawings 10 represents a structure of any approved type which serves 'asa support for the insulators l1 and 12. The insulator 11 carries at its upper enda hinge member 13 to which is secured oneof-the line terminals 14.

The insulator 12 carries at its upper end a contact 15 to which is secured the other line 1 shown in said fi When it is desired to open the circuit, the

'dentations as at 21 which co-act with the dentat1ons 22 upon the contact 15 to loclrlthe" switch as hereinafter-explained. if I The pin 23 extending between -the blades 17-17- servesf to limit'the rotation of the 'cam 201m counter-clockwise direction.

. The sprin'g 24 i's'secured to the pin 25'and the latter is secured in the blades 17. 17 'in anyapproved manner. T-he spring 24 is prevented from moving in a clockwise direction by the pin 26 which is secured ini the blades 17'17 I in any a'pproved manner 'and i the end of said'spring'is'mounted in" the notch 27 formed in the cam '20. Thus;- the force of said spring presses the dentations againstithe dentations 22. I "f I f:

The switch bla'd'es 17- 17 are each: provided with a slot having-- rounded en'ds' such as 28, and the cam 20 is provided with a slot 29dhaving one round end and one straight en p The pole 30 is provided with an end 31 of any approved form and said end hasa key portlon 32 shaped as shown in Fig 5 to fit the slot 29 in the cam 20.

The operation of my improved switchis as follows and 2, the dentations 21 engage the dentations 22, and should any force act to move the blades in a counter-clockwise direction 1 about the bolt 18, thisforce will be resisted by the interaction of said dentations, thus locking the switch blades in the position res.

operator introduces the key portion 32 within the slot 29 of the cam 20and moves the pole 30 upwardly, thus moving the denta-f tions 21 from the dentations 22 and the further motion of the key portion 32 brings it into contact with theslo-t 28 after which the further upward motion of the pole 30 moves the switch blades 17-4? in a counter-clockwise direction upon the bolt 18, thus open in the circuit.

when it is desired to close the circuit, the

switch blades 17,17 are moved in a clockdentations 22 and slide along same without interfering with the clockwise motion of said blades. Thus, it will be noted that my position with reference to the contact 15 During no i improved lock locks the blades l717 at any f after the dntations 21 come in contact with the dentations 22. .o

By this construction, I am enabled toprovide a switch lock which looks the bladeseven though the latter are not movedto a pre-determined position, and thus avoids the objection heretofore existing to switch locks in that the latter failed to lock the'switch hlade unless it was moved to acertain position; a t

While I have'shown one embodiment: of

my improved switch, it is to be noted that man-y changes may be made therein without departing fromthe spirit of my inven-' tion; As for instance,;the dentations 21 and 22 may, be omitted and various changes may ,bdmad in the fixed and movable contact makers;

I 1. 1m; switch lock, tile combination with a movable contact maker and a fixed contact-, o'f'a cam, on said maker located toengage said fixed-- contact at any one of a plurality of positions of, said maker and prevent-movement 'of'said' maker with reference to: said fixed contact;-

2'. In a switch lock, the combination with a movable contact maker and a fixed contact, of a cam on saidmaker located to engage said fixed contact at any one of a plurality of positions of said maker and prevent movement of said maker with reference to said fixed contact towards the open circuit position.

3. In a switch lock, the combination with v a movable contact maker and a fixed contact,

rality of positions. I I

In testimony whereof, a fix mysignature'. a I FRANK T. LEILICH. 

